斜拳
Shaken
Angled fist

Also known as naname ken 斜め拳 (diagonal fist).

 

The Seibukan shaken is not only angled laterally
It is also angled slightly downward, so that the wrist is aligned with the dai kentō (large knuckles)

In the execution of a punch, this downward angling occurs at the last moment, further accelerating the strike

Alan Smith
Shōrin ryū Seibukan